22 · Diagnostics

Central locking not working

Make: Fiat
Model: 500 Factory Service Manual
Year: 2007–2024
Section: Doors › Central locking not working

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Fault diagnosisCentral locking not working

CENTRAL LOCKING NOT WORKING

1.2 8v, 1.3 Multijet, 1.4 16v

When the central locking is activated using the mechanical key or from the inside, via the safety knob, the central locking system does not work.

N.B.: The door opening/closing command reaches the Body computer node. The latter sends the signal received to the actuators which close/open the side doors, and directly controls the closing of the boot lid.

1	CHECK USING DIAGNOSTIC EQUIPMENT	All OK	Problems encountered	Operation
		Test results
	Connect the Examiner diagnostic equipment and check: that there are no faults.	Move on to Step 2	Presence of errors.	Continue following the instructions for the diagnostic equipment.
2	CHECK USING DIAGNOSTIC EQUIPMENT	All OK	Problems encountered	Operation
	Keeping the Examiner diagnostic equipment connected to the Body Computer, carry out the active diagnosis for the defective door lock.	Move on to Step 3	The door does not close/open.	Move on to Step 4
3	CHECK USING DIAGNOSTIC EQUIPMENT	All OK	Problems encountered	Operation
	Using the Examiner diagnostic equipment, check that the learning of the change of state for the door opening/closing switch is correct.	Move on to Step 5	The signal for the door opening/closing switch status has not been learnt correctly.	Move on to Step 4
4	ELECTRICAL CIRCUIT CHECK	All OK	Problems encountered	Operation
	Check the continuity/insulation of the electrical connection between the defective door lock and the Body Computer Check the continuity/insulation of the electrical connection between the Body Computer, the dashboard control unit and the defective door lock See E3040 CENTRAL LOCKING	Move on to Step 5	1. Electrical connection broken or not insulated. 2. Defective front door lock	1. Restore the electrical connection See E3040 CENTRAL LOCKING 2. Replace the front door lock Op. 7005N21
5	CORRECT LOCK OPERATION CHECK	All OK	Problems encountered	Operation
	Check that the door locks are working properly	Move on to Step 6	Defective front door lock	Replace the defective door lock Op. 7005N21
6	BODY COMPUTER CORRECT OPERATION CHECK	All OK	Problems encountered	Operation
	Check that the body computer is working properly	End of diagnosis.	Body Computer defective	Replace body computer Op. 5505A32 BODY COMPUTER - R.R

‹ Prev Front door closing defective Next › Central locking / not working with remote control

Parts & tools for this job For 2007 Fiat 500

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